UML1.x Collaboration Diagram

Shows a GIF "animation" (1.9M, 44% size) of a UML1.x collaboration diagram model of the sequence of exchanges. Note the novel representation of data token instance exchanges between web Component instances. One is invited to imagine the data tokens "sliding" along the pairs of stereotyped Association instances (links) between the data tokens and the web subsystem instances. (Many aspects could now be better modelled with UML2 Components providing and requiring interfaces.)